Speed control or governor for revolving doors



July 28, "1936.

B. H. UHRICH SPEED CONTROL OR GOVERNOR FOR REVOLVING lDOORS Filed Aug.29, 1955 's sheets-sheet-l lNvENToR y Y: ,Eur/25E Wz/u z Y Y BY ATTORNEl .bw N uw WITNESSES July 28, 1 936.

SPEED B H. UHRICH 2,048,716

CONTROL OR GOVERNOR FOR REVOLVING DOORS Filed Aug. 29 1953 3Sheets-Sheet 2 WTNESSES aM/.fish

ATTORNEY July 28, 1936. B. H. UHRlcH 2,048,716

` SPEEDy CONTROL OR 4GOVERNOR FOR REVOLVING DOORS Filed Aug. 29, 195s ssheets-sheet 's Patented July 28, 1936 UNITED .STATES y SPEED CONTROL ORGOVERNOR FOR REVOLVING DOORSV Burns H. Uhrich, Independence, Kans.,assignor` to AThe Atchison yRevolving Door Cor,V Independence, Kans., acorporation of Delaware Application august r.29, 1933, serial m1687377#solaims.A (ci. 2x1-13)v Y The present invention relates to aspeedcontrol or governor for revolving door'sand ,has for rits object toprovide a speed control or governor of simple construction,A comprisingfluid pressure 5 speed checks and .interconnecting operating mechanismso arrangedY that they lcooperate with each other to insure uniform andequalized resistance at all points as the door is revolved in operation,and to automatically increasethe resistance to the revolution ofthe doorVshould an attempt be made to revolve the door at an excessive speed. Yy

A further object of the invention is torso con.- struct and arrange thedevice that .the wings of the door may be collapsed andmoved to one sidewhen` it is desi-red todispenseftemporarily with the use thereof. v

To the above, endsl the present,v invention consists of the speedcontrol or governor-for revolving doors and of the devices and:combinations of deviceswhichwillbe hereinafter described and Theinvention is shown intheA accompanying 4drawings in which Y Y Figure 1shows,` a fragmentary portion" of the upper part of arevolving doorandthe speed control or governor, with pQllionsv of the `superstructurein longitudinaL and diarnetrioal.sec-

tions; f

o9 y Figurerzshows a fragmentary ;view of the. supporting track and thespeed'lcontrol 'governor supported therein, all the partsybeinglshown ingtop planrview with the rightfhand trolley Wheels Ypartially brokenaway; r n i Figures y3, 4 and show in planview the interconnectingoperating mechanism between the ldoor and the iiuid pressurecheckingdevices, the differentviews showing the parts ,in variouspositions during theopera-tionfthereof; r 40 Figure 6 is asectionalviewofone .of the duid pressure checking devices taken .on.adiametrical ,line cutting the operatingshaft and v.showing the doubleacting piston and `otherparts in ,plan View. Similar referencecharacters, will be Vemployed throughout the specification. and drawingsVrto designate corresponding parts.,

In the drawings ,I Vis `a supporting spindle carrying the wings 2 of thedoor connected 'theretoin any usual manner to revolve therewith and tobe turned-thereon soy as to havea collapsing movement; the spindle I.being supported at its lower .end any suitable mannerand at its hupperend in a bearing mounted on the truckx, and may be provided with theusual circular plates .155 v,II towhich .the wings 2 are directly`connected and supported and to which theyimay be lockedand heldinfaradial position, there being usuallytwo such plates 4, the lower onein the Vpresent case, as well as themounting forjthe lowery end ofthespindle orshaftI and the bearing carried by the 5 truck 3 which supportspart of the Vweight of the spindle I so as to vpermit the entirestructure to revolve freely, are not specifically shown; but they allmay be of any usual or preferred construction well known to thosefamiliar with this 10 art. The ceiling 5 of the :door closure, usuallycirf cular in form, is provided with a radial slot 6 extending from apoint corresponding to the axial center, towards` the .periphery and theside 15 wall ofthe door structure, not shown.V 'I'his is for the purposeof permitting the spindle Ivandthe revolving door when collapsed to bemoved to one side', leaving .the dooropening clear, all in the usualmanner.V Of .course it is understoodV that 20 the lower end of 'the'spindle and its support will partake of this lateral orradial movement.lI" Above'the ceiling 5 is a trough-like box '1 eX,- tending in adiametrical direction on a line .which will bring the axial line of theshaft I in 25 'the center ofthe longitudinalrcentral portion thereof;The box 'I comprises a-base 8 and upwardly extending side walls' 9 vonlyone of which is shown in Figure 1, but both of which are shown in Figure2. V.The base 9 is slotted as at I0,"cor 30 responding to the slot inthe ceiling 5,V thus permitting the spindle I to be moved freely incollapsingthe door. 1 Y

The fluid .pressure checks are carried by the truck 3 Hwhich at itsopposite ends is provided 35 withftrolley wheelso'r rollers II arrangedto-roll over the bas'edof the box Vl.v Preferably the roll- A ers .IIwill bev'moun'ted on inclinedaxes vas indicated, so thattheirperipheries 'will contact with `the angle formed by the base 8 and theWalls` 9 40 of the box 'I, thereby preventing any frictional contact ofthe faces of the rollers I I with'the Ainner facerof thewalls 9 andinsure the'Y reduction vof frictiontoaminimum.

As hereinbeforepointed out, Vthe truck at .its '45 'forward endlcarriesthe top supporting bearing `for theispindle' l, a portion of thebearingbeing Yshown at I2. I I'he trucks has a vertical `side wall `dottedlines I l" in FigureLjwhereby thevchecks I 5 and I 5"* arerheld in"alignment Vwith, eachother 55 and rigidly supportedfagainst allnivementwith Y relation to each other Yand thertruck 3.

andv IV are of the fluid pressure type, each ofV themcomprising acylindrical chamber filled :opposite ends.

lated gear 22 As shown 1n Figure 6, the checking devices I5withranyrdesirable fluid I8, andY aY reciprocating 4doubled'piston I9and 'suitable checkvalves 20 at Each of the pistons I9 is provided witha rack 2 Il which engages with a mutiment being such that a partialrotary movement 01EV the VYshaft 23 is permittednto reciprocate thepiston 5,v displacing the Vfluid I8 which will resist of course, themovement of the piston to that extent limited by theY adjustmentfofwthecheck 1 4 valves 20.

4 pivotally connected at The casings of the checks'I5-and I5' also havekan upper circular chamberrwhich communicates by means of a chamber andan opening 26 withV the piston-chamber. (See lFigures 1, 2 and 6.)r"I'he'shafts 23Ywhich carry the mutilated gears 22 project through thetop of the circulary portion 24 ofthe casing 5, and crank arms 21 and 28are xedly` secured to the upper end of said shafts, r

The .npper end of the spindley I is provided with acra'nk 29 whichrotates therewith.V Y By means of the link 38 the crank 29 is'connectedto the check I5, the said arm 38 and atV 32 to the crank arms of thecheck I5". YThe links 33 and 35 Yare 'pistons in the checkalso-pivotally connected to a toggle link 31 which `is pivotally,mounted at 38to a boss carried by the sidewall I3 of the trolley.

Y Byfthis arrangement the rotary movement-of of the door willcompletely'rotate the the spindle crank 29, imparting1 oscillatingmovements through the links 39, 33 and 35 to the respective crank armsY21.and 28, `thus reciprocating the Y tained in the 'checks.

Vwill vary with eachother in so far as direction,

Yspeed and extent of movement 4are concerned;

Y thusthefchecks will Ycomplement eachother and there will be novariation of the checking movement; on the door itself.

will be clearly understood by an inspection of Figures 2,'3, 4` and 5,vthe'oper'ating con'- nections being shown in four diierent'positions.

Th'ezc'anks 29 Vwill revolve with thedoor spindle lfina counterclockwisefdirectionfas indicated "by the arrows1inrFiguresk2.,v3, 4 and5./ In these nguresthe crank 29 'and the various links and levers areshown in relative positions during ,aV

V complete reciprocationcf the pistons'rin the jchecks I5 and I5. InFigure'Z the piston in the check I5 has completed approximatelythreestroke tothe right, while the pis- V.ton in check VI5 is atthe endof its strokefto the right. In Figure 5 the crank 29 has moved to aVposition.where,time piston in the check I5 is at 'theleft for a part ofz of` its stroke 23 in afposition still further on its path of travelandthe crank arm 28 fully extended towards the Y has traveledapproximately one-quarter devices I5 and I5` and con- Y trolling'thespeedV of rotation of the door and preventing itslbeng rotated at anexcessivel and dangerous speed. In the normal operation of the sdoorfat; a limited speed the operationef the 'checks'. I5 and, I5Y putspractically noy resistance fon the door, but as soon. as the revolutionof `the door exceeds a normal speed thefreciprocations spindle. It isthe `timed operationV in tandem of the two checks'which constitutestheimportant the endV of its stroke to the right, while the links 33 and 35and the toggle: link 31 have moved the crank arm 28 andthe piston in'thefcheck' I51to itsstroke. `In Figure 3 the crank 29 by means of thelink 30Yand the crank f arm 21-has moved the piston in the checkgI5 forthree-.quarters of the distance in itsVv stroke to the left,'while theposition of the'crank arm 28 indito the left. Figure 4 shows thecrankleft with the piston in the check I5at the end of its lefthand stroke,while the crank arm 28 1 Y of the distance VVback, on its righthandstroke.` VIt will thus be clear that there will be a constant resis-Vtance against the revolution of the crank 29, which, under normalconditions, andk wheretheV 2 door is not revolved at`V excessive speed,will pro- 1 vide a smooth operation; VVbut as soon as the speed Vofrotation exceeds a predetermined limit the door will' be automaticallychecked by the rein the revolution ofthe door are both pistons atmounted on a shaft 23, the arrange-giggcates that the piston in thecheck I5 is at the end Yl Vsistance of the reciprocating pistons. At nopoint 25V Y the endof their stroke Vat the same instant. Y'

When the piston in check I5 Ahas reached the end of ,itsY stroke andisstarting back, the piston Y I in thecheck I5 is approximately at themiddle of its stroke. `This avoids anyvjerky action in the'` rotationofthe door, since at all -timesthereis sufcientresistance exerted bythechecks.,Vv

Itwill of course e Y checks I5 and I5' at one side of the spindle Ithere will befno interference with the movement Vof thecollapsed'doortowards the left, as shown in Figure 1 of 'the drawings,"and for this/.reason the Yarrangement shown is the preferred form; butin so far as the controlling or'governing action of the deviceisconcerned they, would be Apresent eventhoughone of the checking deviceswas placed'fon Aone side Y of the spindle andthe other checking deviceon the otherside of the part of the invention.

' VThe apparatus will ofcourse embody any suite-V be noted that byplacing born 'Y able latching mechanism such Vas the lever or plate 39pivotally mountedV to swing up and down as at `4l) and which carriesdiametrically opposite lugsIII arranged to engage notchesV in platessupported uponthe inner face of the walls 9, of Y the support 1, butsuch latching mechanism in and of itself constitutes no part ofthepresent invention. j Y

It will be understood; of course that the particular construction of thechecking devices is not of applicants invention, Vbut the arrangement ofthem in pairs and'so operating them Vthat lthe operation Vof one willoverlap that ofthe other, or in 4tandem,as it were, thereby produc-V inga constant:V smooth checkgor control of the Speed'of yrotation ofthedoorg isof v the essence of the present invention., Also, whilethear- 6 rangement shown is that preferred by the applicant in that'itpermits the door to Vbe fully collapsed and'moved to oneside, theinventionincludes an arrangement whereby the tandem checks may be placedatldiametrically opposite sides of thedoor spindleand' produce the sameeffect in so far as its involved.VV e.' Y

I claim:

speed control function is Y 1.'In combination, a revolving door,` alspeed control or governor comprising two fluid pressure checks, andmeans connected with the door spindle to operate the checkssimultaneously in overlapping time relation.

2. In combination, a revolving door, a speed control or governorcomprising two fluid pressure checks both disposed at one side of thedoor spindle in line with each other, a crank carried by said spindle, alink connecting said crank With one of the fluid pressure checks, andtoggle links connecting said crank With the other of said fluid pressurechecks.

3. In combination, a revolving doo-r comprising a vertically disposedspindle, a sliding truck con# nected to and arranged to be movedlaterally with said spindle, a pair of fluid pressure check devicesmounted on said truck in alignment with each other, a crank carried bysaid spindle, and connections between said crank and said checks tooperate them simultaneously but in overlapping time relation to eachother.

4. In combination, a revolving door, a speed control or governorcomprising two fluid pressure checks both disposed at one side of thedoor spindle in line with each other, each of said checks provided withan oscillating arm, a'crank carried by the spindle at its upper end, alink pivotally connecting said crank to the oscillating arm of one ofthe checks, and a toggle link construction pivotally connecting thecrank Vand the oscillating arm of the other check.

5. In combination, a door having radial wings, a revolving spindle onwhich said door is mounted, a crank on said spindle, two speed controldevices, an oscillating arm on each of the speed control devices, andconnecting means between the spindle, crank, and the oscillating arms ofthe speed control devices, whereby the rotation of the door moves thesaid arms in certain time relation so that they will reach their highestrate of speed at different intervals.

BURNS H. UHRICH.

